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Posted to users@tomcat.apache.org by Faheem Mitha <fa...@email.unc.edu> on 2007/04/19 04:19:20 UTC

problems configuring mod_jk

Hi,

I'm trying to set up Apache to talk to Tomcat using the mod_jk connector.
However, I get the following error in the log, /var/log/apache2/mod_jk.log

jk_handler::mod_jk.c (1986): Could not find a worker for worker 
name=ajp13_worker

Apparently it cannot find the definition (or whatever) for ajp13_worker, 
but this is defined in /etc/libapache2-mod-jk/workers.properties as far as 
I can tell.

I include the relevant portions of my config below. If anyone can tell me 
what I'm doing wrong, that would be great.

Thanks in advance.                                                 Faheem.

************************************************************************
Relevant portion of apache config
************************************************************************
LoadModule jk_module /usr/lib/apache2/modules/mod_jk.so

<VirtualHost x.x.x.60:443>
     ServerName ...
     # Sample mod_jk configuration
     # for Apache 2
     #
     # for all commands/options available see the manual
     # provided in libapache-mod-jk-doc package.

     # The location where mod_jk will find the workers definitions
     JkWorkersFile       /etc/libapache2-mod-jk/workers.properties

     # The location where mod_jk is going to place its log file
     JkLogFile   /var/log/apache2/mod_jk.log

     # The log level:
     # - info log will contain standard mod_jk activity (default).
     # - warn log will contain non fatal error reports.
     # - error log will contain also error reports.
     # - debug log will contain all information on mod_jk activity
     # - trace log will contain all tracing information on mod_jk activity
     JkLogLevel  info


     # Assign specific URLs to Tomcat. In general the structure of a
     # JkMount directive is: JkMount [URL prefix] [Worker name]

     # send all requests ending in .jsp to ajp13_worker
     JkMount /*.jsp ajp13_worker
     #JkMount /* ajp13_worker
     # send all requests ending /servlet to ajp13_worker
     #JkMount /*/servlet/ ajp13_worker

     # JkUnmount directive acts as an opposite to JkMount and blocks access
     # to a particular URL. The purpose is to be able to filter out the
     # particular content types from mounted context.

     # do not send requests ending with .gif to ajp13_worker
     #JkUnMount /servlet/*.gif ajp13_worker

     # JkMount / JkUnMount directives can also be used inside <VirtualHost>
     # sections of your httpd.conf file.
</VirtualHost>

************************************************************************
/etc/libapache2-mod-jk/workers.properties
************************************************************************
# workers.properties -
#
# This file is a simplified version of the workers.properties supplied
# with the upstream sources. The jni inprocess worker (not build in the
# debian package) section and the ajp12 (deprecated) section are removed.
#
# As a general note, the characters $( and ) are used internally to define
# macros. Do not use them in your own configuration!!!
#
# Whenever you see a set of lines such as:
# x=value
# y=$(x)\something
#
# the final value for y will be value\something
#
# Normaly all you will need to do is un-comment and modify the first three
# properties, i.e. workers.tomcat_home, workers.java_home and ps.
# Most of the configuration is derived from these.
#
# When you are done updating workers.tomcat_home, workers.java_home and ps
# you should have 3 workers configured:
#
# - An ajp13 worker that connects to localhost:8009
# - A load balancer worker
#
#

# OPTIONS ( very important for jni mode )

#
# workers.tomcat_home should point to the location where you
# installed tomcat. This is where you have your conf, webapps and lib
# directories.
#
workers.tomcat_home=/usr/share/tomcat5.5

#
# workers.java_home should point to your Java installation. Normally
# you should have a bin and lib directories beneath it.
#
workers.java_home=/usr/lib/j2sdk1.5-sun

#
# You should configure your environment slash... ps=\ on NT and / on UNIX
# and maybe something different elsewhere.
#
ps=/

#
#------ ADVANCED MODE ------------------------------------------------
#---------------------------------------------------------------------
#

#
#------ worker list ------------------------------------------
#---------------------------------------------------------------------
#
#
# The workers that your plugins should create and work with
# 
worker.list=ajp13_worker

#
#------ ajp13_worker WORKER DEFINITION ------------------------------
#---------------------------------------------------------------------
#

#
# Defining a worker named ajp13_worker and of type ajp13
# Note that the name and the type do not have to match.
#
worker.ajp13_worker.port=8009
worker.ajp13_worker.host=localhost
worker.ajp13_worker.type=ajp13
#
# Specifies the load balance factor when used with
# a load balancing worker.
# Note:
#  ----> lbfactor must be > 0
#  ----> Low lbfactor means less work done by the worker.
worker.ajp13_worker.lbfactor=1

#
# Specify the size of the open connection cache.
#worker.ajp13_worker.cachesize

#
#------ DEFAULT LOAD BALANCER WORKER DEFINITION ----------------------
#---------------------------------------------------------------------
#

#
# The loadbalancer (type lb) workers perform wighted round-robin
# load balancing with sticky sessions.
# Note:
#  ----> If a worker dies, the load balancer will check its state
#        once in a while. Until then all work is redirected to peer
#        workers.
worker.loadbalancer.type=lb
worker.loadbalancer.balanced_workers=ajp13_worker
********************************************************************

*******************************************************************
Relevant portion of /etc/tomcat5.5/server.xml
*******************************************************************
     <!-- Define an AJP 1.3 Connector on port 8009 -->
     <Connector port="8009"
                enableLookups="false" redirectPort="8443" protocol="AJP/1.3" />



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